Compiling WebKit with bison 2.3 works fine. After an update to bison 2.4, compiling the CSS parser fails with perl /usr/src/ark/BUILD/WebKit/WebCore/css/makegrammar.pl ../../../WebCore/css/CSSGrammar.y tmp/CSSGrammar ../../../WebCore/css/CSSGrammar.y:348.11-20: symbol maybe_sgml redefined Died at /usr/src/ark/BUILD/WebKit/WebCore/css/makegrammar.pl line 35. make[1]: *** [tmp/CSSGrammar.cpp] Error 2
*** This bug has been marked as a duplicate of 22205 ***